1 1 1X1 1 1A)   0 B)  (X3)(X 1)3 C)  (X 3)(X1)3 D)  (X3)(X1)3

Câu 90. Tính định thức:

1 1

1

x

1 1 1

a)

 

0

b)

 

(

x

3)(

x

1)

3

c)

 

(

x

3)(

x

1)

3

d)

 

(

x

3)(

x

1)

3

.

1

1 1

 

.